1 /*-
2 * Kernel interface to machine-dependent clock driver.
3 * Garrett Wollman, September 1994.
4 * This file is in the public domain.
5 *
6 * $FreeBSD$
7 */
8
9 #ifndef _MACHINE_CLOCK_H_
10 #define _MACHINE_CLOCK_H_
11
12 #ifdef _KERNEL
13 /*
14 * i386 to clock driver interface.
15 * XXX large parts of the driver and its interface are misplaced.
16 */
17 extern int clkintr_pending;
18 extern u_int i8254_freq;
19 extern int i8254_max_count;
20 extern uint64_t tsc_freq;
21 extern int tsc_is_invariant;
22 extern int tsc_perf_stat;
23
24 void i8254_init(void);
25 void i8254_delay(int);
26 void clock_init(void);
27
28 /*
29 * Driver to clock driver interface.
30 */
31
32 void startrtclock(void);
33 void timer_restore(void);
34 void init_TSC(void);
35 void resume_TSC(void);
36
37 #define HAS_TIMER_SPKR 1
38 int timer_spkr_acquire(void);
39 int timer_spkr_release(void);
40 void timer_spkr_setfreq(int freq);
41
42 #endif /* _KERNEL */
43
44 #endif /* !_MACHINE_CLOCK_H_ */
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